Abstract: Programmable electronically closing lock, with knob of the type which incorporates programmed electronic elements which make possible bidirectional communication between lock and key without contact between the two is disclosed. It consists of an electronic board (7) with a microcontroller (17) which controls its opening/closing and communicates with an antenna (8) built into a knob block, made up of a knob (3) joined permanently to a push button/mounting hole piece (5) which has an upper surface (s), lateral slots/guides (13) and a fixed knob guide (4) carrying the antenna (8) and in which the knob (3) moves up and down under the action of a coaxial spring (11) on the knob guide (4) and pins (14) of a tongue block (6) sliding on the slots (13) causing movement in the tongue block. The microcontroller (17) operates a bi-stable solenoid (9).